Regensburg 2013 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 33: Structural Materials

MM 33.3: Talk

Wednesday, March 13, 2013, 10:45–11:00, H26

Characterization of the microstructure in Mg based alloy — •Arwa Kutbee¹, Talaat Al-Kassab¹, Xinhua Zhu², Zhiguo Liu³, and Wenzheng Zhang⁴ — ¹King Abdullah University of Science & Technology, Division of Physical Sciences and Engineering, Thuwal, 23955-6900, Kingdom of Saudi Arabia — ²National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China — ³National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China — ⁴Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Magnesium based alloys are prospective materials for light weight application. Their creep and mechanical properties can be largely modified by precipitation hardening. In this paper, we report on the decomposition behavior of Mg-6.5Sn-3.3Zn-0.2Mn wt.% alloy using transmission electron microscopy (TEM) and Atom Probe Tomography (APT). Two techniques for TEM sample preparation have been employed: Focused ion beam (FIB) and ion beam milling. TEM lamella prepared by FIB at certain energy of the ion source might largely influence the crystalline structure in these alloys. Whereas, the ion beam milling method provided a preferable route to prepare transparent specimen for microstructural characterization. The TEM micrographs showed a lath shaped precipitates in the Mg matrix. APT composition analysis of the decomposed microstructure will be also presented and discussed.